jwz pundidates on how rss aggregation sites might get more useless when content providers freak out about their content appearing outside their control. online comic providers are already like this. the otherwise-excellent comictastic had to drop support for various popular comics. of course, it then has a flexible enough system that you can just add support for the comics manually. clue for content producers: once you've hung a piece of content off a http: url, you've lost any control over what client i may choose to view it in.